The Charles County Sheriff's Office is investigating a Friday evening argument that resulted in two people being shot.

At 8:30 p.m. Aug. 23, the sheriff's office responded to the Westlake Dash-In in Waldorf for a report of a shooting.

Based on preliminary information, two vehicles pulled up to the gas pumps and witnesses reported that the groups of people from both vehicles were arguing.

Police said that someone from one of the vehicles pulled out a gun and began to fire. One person from one of the vehicles was struck in the leg, and a passerby who was headed into the convenience store was struck in the arm.

Diane Richardson, spokeswoman for the sheriff's office, said that the passerby struck on the arm was flown to the University of Maryland Charles Regional Medical Center in La Plata with injuries that were not life-threatening.

Richardson said that later that night, someone showed up at the same medical center with a gunshot wound to the leg. That person is believed to be involved with one of the parties from the argument at the Dash- In, and the injuries do not appear to be life threatening, Richardson said.

Richardson said that both shooting victims are in their 20s.

It is unclear at this time what the two parties were arguing about. The investigation is continuing.

Anyone with information is asked to contact the sheriff's office at 301-932-2222 or Charles County Crime Solvers at 1-866-411-TIPS.